Allocated but unannounced space
Every block here was allocated or assigned by a regional internet registry, and none of them appeared in any routing table we collected at our last snapshot — neither as a route of their own, nor covered by a larger announcement, nor carved up into more specifics.
“Unannounced” does not mean “unused”
Plenty of allocated space is deliberately kept off the public internet: private interconnects, lab and lawful-intercept ranges, networks reachable only inside one operator, and space held in reserve. Some of it is announced somewhere our collectors cannot see, which is a limit of our vantage points rather than a fact about the block.
It is also a snapshot, not a history: a block announced yesterday and withdrawn this morning appears here today. Nothing on this page means a block is unallocated, available, or free to announce.
Browse by registry
Browse by country
Countries with the most unannounced blocks, largest first.
Unannounced blocks
85,075 blocks match, ordered by prefix.
| Prefix | Addresses | Registry | Country | Allocated |
|---|---|---|---|---|
| 185.1.12.0/24 | 256 | RIPE NCC |  NO | 11th Apr 2013 |
| 185.1.120.0/24 | 256 | RIPE NCC |  PL | 15th Jan 2020 |
| 185.1.121.0/24 | 256 | RIPE NCC |  MK | 9th Jul 2018 |
| 185.1.122.0/24 | 256 | RIPE NCC |  NL | 1st Oct 2018 |
| 185.1.123.0/24 | 256 | RIPE NCC |  GR | 30th Oct 2018 |
| 185.1.124.0/24 | 256 | RIPE NCC |  IT | 13th Nov 2018 |
| 185.1.125.0/24 | 256 | RIPE NCC |  DE | 18th Dec 2018 |
| 185.1.126.0/24 | 256 | RIPE NCC |  SA | 6th Feb 2019 |
| 185.1.127.0/24 | 256 | RIPE NCC |  BE | 6th Feb 2019 |
| 185.1.128.0/24 | 256 | RIPE NCC |  RO | 12th Feb 2019 |
| 185.1.129.0/24 | 256 | RIPE NCC |  KW | 13th Feb 2019 |
| 185.1.13.0/24 | 256 | RIPE NCC |  RU | 24th Jun 2013 |
| 185.1.130.0/24 | 256 | RIPE NCC | PL | 15th Feb 2019 |
| 185.1.131.0/24 | 256 | RIPE NCC | DE | 21st Feb 2019 |
| 185.1.133.0/24 | 256 | RIPE NCC |  BA | 27th Mar 2019 |
| 185.1.134.0/24 | 256 | RIPE NCC |  UA | 29th Mar 2019 |
| 185.1.135.0/24 | 256 | RIPE NCC |  CH | 10th May 2019 |
| 185.1.136.0/24 | 256 | RIPE NCC |  GB | 11th Mar 2020 |
| 185.1.137.0/24 | 256 | RIPE NCC |  BG | 5th Jun 2019 |
| 185.1.138.0/24 | 256 | RIPE NCC | BE | 11th Jun 2019 |
| 185.1.139.0/24 | 256 | RIPE NCC | IT | 18th Jul 2019 |
| 185.1.14.0/24 | 256 | RIPE NCC |  FR | 18th Mar 2025 |
| 185.1.141.0/24 | 256 | RIPE NCC | GB | 26th Aug 2019 |
| 185.1.142.0/24 | 256 | RIPE NCC |  SE | 5th Sept 2019 |
| 185.1.143.0/24 | 256 | RIPE NCC |  ES | 10th Sept 2019 |
| 185.1.144.0/24 | 256 | RIPE NCC | FR | 13th Jun 2022 |
| 185.1.145.0/24 | 256 | RIPE NCC | PL | 25th Sept 2019 |
| 185.1.146.0/24 | 256 | RIPE NCC | UA | 26th Sept 2019 |
| 185.1.147.0/24 | 256 | RIPE NCC | CH | 23rd Feb 2022 |
| 185.1.149.0/24 | 256 | RIPE NCC | FR | 29th Oct 2019 |
| 185.1.15.0/24 | 256 | RIPE NCC |  AE | 15th Jul 2013 |
| 185.1.151.0/24 | 256 | RIPE NCC |  KG | 20th Nov 2019 |
| 185.1.154.0/24 | 256 | RIPE NCC | CH | 3rd Dec 2019 |
| 185.1.155.0/24 | 256 | RIPE NCC | DE | 10th Dec 2019 |
| 185.1.156.0/24 | 256 | RIPE NCC | BG | 13th Dec 2019 |
| 185.1.157.0/24 | 256 | RIPE NCC | SE | 20th Dec 2019 |
| 185.1.158.0/24 | 256 | RIPE NCC |  TR | 24th Dec 2019 |
| 185.1.159.0/24 | 256 | RIPE NCC |  QA | 10th Feb 2020 |
| 185.1.16.0/24 | 256 | RIPE NCC | UA | 17th Jul 2013 |
| 185.1.160.0/23 | 512 | RIPE NCC | NL | 12th Mar 2025 |
| 185.1.162.0/24 | 256 | RIPE NCC | RU | 18th Feb 2020 |
| 185.1.163.0/24 | 256 | RIPE NCC | FR | 23rd Mar 2020 |
| 185.1.164.0/24 | 256 | RIPE NCC | PL | 27th Mar 2020 |
| 185.1.165.0/24 | 256 | RIPE NCC | RU | 15th Apr 2020 |
| 185.1.166.0/23 | 512 | RIPE NCC | DE | 23rd Apr 2020 |
| 185.1.169.0/24 | 256 | RIPE NCC | FR | 4th Jun 2020 |
| 185.1.17.0/24 | 256 | RIPE NCC | PL | 21st Aug 2013 |
| 185.1.170.0/23 | 512 | RIPE NCC | DE | 29th May 2020 |
| 185.1.172.0/24 | 256 | RIPE NCC | GR | 4th Jun 2020 |
| 185.1.173.0/24 | 256 | RIPE NCC |  CZ | 9th Jun 2020 |